阻尼对主系统地震载荷的影响分析

Analysis of Effect of Damping on Seismic Loads of Primary Equipment

以核电厂主系统非线性有限元模型为研究对象,采用ANSYS软件分析阻尼不同施加方式对主系统地震载荷的影响。结果表明,在主系统地震分析中,采用瑞利阻尼方式计算的载荷相对比较保守;在计算方法允许的情况下应尽可能采用直接施加模态阻尼或材料阻尼的方式,以降低载荷的保守性,提高核电厂的经济性。

Based on the primary nonlinear system of the nuclear plant,a primary seismic analysis was completed with ANSYS software.The results show that the load is conservative using directly Rayleigh damping.If the calculation method is permission,using the modal damping can decrease the conservativeness of seismic loads and improve the economy of the plant.